Injection and combustion of RME with water emulsions in diesel engine

• Autorzy: Banot K. , Cisek J.
• Konferencja: Kongres Silników Spalinowych (20-23.05.2007; Kraków, Poland)
• Języki publikacji: PL

Abstrakty

EN

This paper presents possibilities of using fully digitized triggerable video system AVL VideoScope 5J3D for analysis of injection and combustion inside diesel engine cylinder fuelled by RME with water emulsions. As a research objects were used: standard diesel fuel, rapeseed methyl ester (RME) and RME - water emulsions. With the aid of helical flow reactor stable emulsions with water fraction up to 30% in weight were obtained, using an additive to prevent the water from separating out of the emulsion. The effect of emulsions on the exhaust gases emissions (NOx, CO and HC), particulate matters emission PM, smoke and fuel consumption of a one cylinder HD diesel engine with direct injection was investigated. Additionally the maximum rise of cylinder pressure was calculated from the indicator diagram. The test engine was operated at constant speed of 1600 rpm and 4 bar BMEP load conditions. A fuel injection and combustion processes were observed and analysed with endoscopes and digital camera. The temperature distribution in combustion chamber was analysed quantitatively with the two-colour method. The injection and combustion phenomena were described and compared. Possibility of reduction of NOx formation in the combustion chamber of diesel engine by addition of water in the combustion zone was presented. Evaporating water efficiently lowers peak flame temperature and temperature in post-flame zone. For diesel engines there is an exponential relationship between NOx emissions and peak combustion temperatures. The energy needed to vaporize the water results in lower peak temperatures oj the combusted gases, with a consequent reduction in nitrogen oxide formation. Experimental results show up to 50% NOx emission reduction with use of 30% water in RME emulsion at unchanged engine performance.

Słowa kluczowe

PL

silnik Diesla; emulsja RME-woda; wtrysk; spalanie; wizualizacja

EN

diesel engine; RME - water emulsion; injection; combustion; visualization

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Silniki Spalinowe
• Rocznik: 2007
• Tom: R. 46, nr SC3
• Strony: 98--111
• Opis fizyczny: Bibliogr. 8 poz.

Twórcy

autor

Banot K.

autor

Cisek J.

• Cracow University of Technology, Poland

Bibliografia

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• [3]. Miyano H., Sungawa T., Tayama K., Nagae Y., Yasueda S.: The Ship Test For Low-NOx By Stratified Fuel-Water Injection System. 21st International Congress On Combustion Engines. Interlaken 1995. CIMAC 1995.
• [4]. Murayama T., Morishima Y., Tsukahara M., Miyamoto N.: Experimental Reduction of NOx Smoke, and BSFC in a Diesel Engine Using Uniquely Produced Water (0-80%) to Fuel Emulsion. SAE Transactions, 1978, nr 780224.
• [5]. Velji A., Remmels W., Schmidt R., M.: Water to reduce NOx - Emission in Diesel engines. A basic study. 21st International Congress On Combustion Engines. Interlaken 1995.CIMAC 1995.
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• [8]. Banot K., "Wykorzystanie wody w strefie spalania oleju napędowego dla obniżenia emisji NOx w silniku wysokoprężnym.", KONMOT-AUTOPROGRES, Czasopismo Techniczne, Wydawnictwo Politechniki Krakowskiej, z. 6-M/2004, s. 79-86, 2004.